Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7bcc3904f2960f1…

MALICIOUS

PDF

52.3 KB Created: 2020-10-28 21:17:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d5e0de64d4df1ad6534a5b65a422d0a SHA-1: 3ba777623e3009f30ade8b8e32f5d4679e93e404 SHA-256: d7bcc3904f2960f14c99632f24476ba0d8d1d063d08f6a0c94cf04d490ffae82
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector pointing to 'https://cctraff.ru/aws?keyword=hess+law+practice+worksheet'. The document body, though heavily obfuscated, contains this URL, suggesting an attempt to direct the user to a malicious site. The presence of multiple external PDF links also indicates a link farm, a common tactic for SEO manipulation or distributing malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://cctraff.ru/aws?keyword=hess+law+practice+worksheet
    • https://xilorufanil.weebly.com/uploads/1/3/0/7/130739938/1166907.pdf
    • https://sivagodumojuji.weebly.com/uploads/1/3/4/2/134235915/vukuxigibatipi.pdf
    • https://vozunutav.weebly.com/uploads/1/3/0/9/130969695/daxasolizi.pdf
    • https://lifafogiter.weebly.com/uploads/1/3/4/3/134321186/8190746.pdf
    • https://tevirilozarenov.weebly.com/uploads/1/3/2/6/132695732/70454e3.pdf
    • https://foduzivanikatik.weebly.com/uploads/1/3/4/4/134492938/nopeg_wuvatomivutoraw_xomudapu_zakubanolaxot.pdf
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/delelides_dasexurekiwar_jajumab.pdf
    • https://riragojefo.weebly.com/uploads/1/3/1/8/131857115/zajefux-lulibowaban-wofusu-domunewitug.pdf
    • https://saxexowiki.weebly.com/uploads/1/3/0/9/130969873/kemav.pdf
    • https://fewevivib.weebly.com/uploads/1/3/0/8/130813821/2992d.pdf
    • https://biduvokiket.weebly.com/uploads/1/3/4/3/134367510/083f29.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.opentle.org
    • https://uploads.strikinglycdn.com/files/5ac850a3-f11d-47b1-b1f8-062b91667b7c/97352070172.pdf
    • https://s3.amazonaws.com/fadedosi/91453341972.pdf
    • https://s3.amazonaws.com/zobuwubedak/nolatirejulofeliwiret.pdf
    • https://uploads.strikinglycdn.com/files/e4f2d141-d913-4fcb-97df-06560c94de19/pimulojuf.pdf
    • https://s3.amazonaws.com/suximawo/cell_theory_worksheet.pdf
    • https://uploads.strikinglycdn.com/files/b7cd6359-8574-401f-9b27-26b91028210e/mario_kart_64_rom_descargar_gratis_p.pdf
    • https://cdn.shopify.com/s/files/1/0268/8391/5962/files/easeus_mobisaver_for_android_apkpure.pdf
    • https://cdn.shopify.com/s/files/1/0493/5699/6767/files/civil_war_musicians.pdf
    • https://uploads.strikinglycdn.com/files/4d2ae372-f778-47e4-8c46-b3a548e64fc5/what_a_wonderful_world_sheet_music_solo_guitar.pdf
    • https://cdn.shopify.com/s/files/1/0506/7590/8795/files/antigone_paul_woodruff.pdf
    • http://scripts.sil.org/OFL
    • http://www.gnu.org/licenses/gpl.html

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007de4.bin
8acd9cef4b9d41473e57683adc7d112d6aada3dd5d9b1015cac3d797795eff6f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DE4 5136 bytes
font_01_sfnt_off00008f5c.bin
f3bd96ce4c782074d5904455801ebde591c8ca9847171f303670b72a33c8b866		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F5C 10144 bytes
font_02_sfnt_off0000aba2.bin
ff25bc8d2d76b6adaba40f97ec1cc18944a6854e769e2bb2ce7b02e2fe565820		 pdf-font-stream PDF embedded font (sfnt) at offset 0xABA2 11128 bytes

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